/*-----------------------------------------------------------------
            S A S   S A M P L E   L I B R A R Y                   
                                                                  
      NAME: SEQDEX3                                               
     TITLE: Documentation Example 3 for PROC SEQDESIGN            
   PRODUCT: STAT                                                  
    SYSTEM: ALL                                                   
      KEYS: group sequential design                               
     PROCS: SEQDESIGN                                             
      DATA:                                                       
                                                                  
   SUPPORT: Yang Yuan             UPDATE: Aug 21, 2007            
       REF: PROC SEQDESIGN, EXAMPLE 3                             
      MISC:                                                       
-----------------------------------------------------------------*/

proc seqdesign altref=0.4
               pss
               stopprob
               errspend
               ;
   TwoSidedPocock:        design nstages=4 method=poc;
   TwoSidedOBrienFleming: design nstages=4 method=obf;
   samplesize model=twosamplemean(stddev=0.8 weight=2);
run;